Over the summer I've been playing with DSP, and ended up with multiple set-ups.  One has to go.  At this one of the most "plug and play" I think it's the best one to offer up. OpenDRC-DI  (https://www.minidsp.com/products/opendrc-series/opendrc-di) This takes a digital input (coax, optical or AES) It applies one of four filters - more on that in a moment It then outputs digital (same options) to your DAC UMIK-1 (https://www.minidsp.com/products/acoustic-measurem